Dynamoelectric machines and assembly of same with a control device

ABSTRACT

Assembly of a device such as a timer particularly adapted for controlling the defrost cycle of a refrigerator, and an electric motor that may be used, e.g., to drive an evaporator or condenser cooling fan. Control device and motor detachably secured and magnetically coupled to one another. Speed reducing gear train is mechanically driven from the control device input member and a switch actuator cam cyclically causes selective opening and closing of switch contacts. Control device may be enclosed to prevent the admission of foreign matter. Unit bearing type of motor includes a polarized magnetic body that forms part of the rotor assembly and is rotatable within a lubricant reservoir of the motor. Oil reservoir cover is formed of a non-ferromagnetic material. The polarized magnetic body establishes a magnetic field that extends beyond the confines of the motor and causes similar movement of a polarized magnetic body in the control device. The control device and motor are modular units and may be manufactured and transported as individually complete or assembled components.

United States Eatent [1 1 Dochterman 1 DYNAMOELECTRIC MACHINES ANDASSEMBLY OF SAME WITH A CONTROL DEVICE [75] Inventor: Richard W.Dochterman, Fort Wayne, Ind.

[73] Assignee: General Electric Company, Fort Wayne, Ind.

[22] Filed: Feb. 7, 1972 [21] Appl. No.: 223,916

[52] U.S. Cl. 310/90, 310/99 [51] Int. Cl. H021 5/16 [58] Field ofSearch 310/99, 90, 103,

111 3,743,872 [451 July 3,1973

Primary Examiner-R. Skudy Attorney-John M. Stoudt, Ralph E. Krisher,Jr.et a1.

[57] ABSTRACT Assembly of a device such as a timer particularly adaptedfor controlling the defrost cycle of a refrigerator, and an electricmotor that may be used, e.g., to drive an evaporator or condensercooling fan. Control device and motor detachably secured andmagnetically coupled to one another. Speed reducing gear train ismechanically driven from the control device input member and a switchactuator cam cyclically causes selective opening and closing of switchcontacts. Control device may be enclosed to prevent the admission offoreign matter. Unit bearing type of motor includes a polarized magneticbody that forms part of the rotor assembly and is rotatable within alubricant reservoir of the motor. Oil reservoir cover is formed of anon-ferromagnetic material. The polarized magnetic body establishes amagnetic field that extends beyond the confines of the motor and causessimilar movement of a polarized magnetic body in the control device. Thecontrol device and motor are modular units and may be manufactured andtransported as individually complete or assembled components.

12 Claims, 3 Drawing Figures DYNAMOELECTRIC MACHINES AND ASSEMBLY OFSAME WITH A CONTROL DEVICE BACKGROUND OF THE INVENTION The presentinvention relates generally to control devices and more particularly tomotor driven timers of the type utilized in domestic appliances;dynamoelectric machines suitable for supplying power to such controldevices; and assemblies that include such devices and dynamoelectricmachines.

Motor driven control devices have long been utilized in many differentappliance applications. For example, Losert US. Pat. No. 3,552,115discloses, inter alia, an interval timing apparatus of a type that maybe utilized during operation of, e.g., cooking equipment. Motor driventimers also may be utilized to provide a means of automaticallycontrolling all or a portion of a cycle of a washing, drying, andrefrigeration equipment, among others.

A defrost cycle is one of the functions that may be controlled inrefrigeration apparatus and Lennon US. Pat. No. 3,193,652 discloses,among other things, a motor driven control that may be used for thispurpose. The particular defrost control device selected for a givenapplication may include switch contacts connected in a power supplycircuit for selectively energizing a refrigerant compressor motor anddefrosting means. Solley US. Pat. No. 3,159,980 is one patent thatdescribes an approach wherein an evaporator fan motor would be used todrive a defrost control. In all of the prior arrangements of which I amaware, however, the motor is provided with a drive pinion that mesheswith the input gear of a speed changing mechanism, e.g., a multi-sectionspeed reducing gear train.

Heretofore, this type of arrangement has been relatively expensive toproduce in practice, the general approach has been to provide a drivepinion equipped small synchronous motor as the power source for thecontrol device mechanism. Although the cost of a control device soconstructed must, of necessity, reflect the cost of the motor includedtherewith, this general approach has nonetheless been followed becauseof the relative ease with which this approach will provide the requisiteprecision alignment and meshing of the motor pinion and control deviceinput gear. The need to provide precision alignment will be betterappreciated by noting that the control device may include a mechanismfor providing a 500,000 to 1 speed reduction and yet still be relativelysmall in over-all size. Thus, relatively small, if not miniature gearsand pinions are used that typically may have a tooth working depthand/or tooth thickness in the neighborhood of about 1/32 of an inch. Theabove mentioned precision alignment must be maintained in order toinsure satisfactory operation of the control device over a relativelylong period of time. The desirability of eliminating the motor normallyprovided as part of the control device package and using instead acondenser or evaporator fan motor has long been recognized and isevidenced, for example, by the above referenced Solley patent. However,the requirement for precision location and alignment of motor pinionsand other gears, among other things, have prevented these otherapproaches from being successfully adopted in practice.

Accordingly, it would be desirable to provide means whereby a motor usedto power a control device in an appliance may be used for other purposesas well, e.g.,

for moving a fluid and whereby the problems of precision alignment areovercome. Moreover, it would be desirable to provide an arrangementwhereby a modular approach may be followed so that a motor designedprimarily for use as a fluid material mover may be supplied andinstalled separately or as an assembly with a control device. In a moredesirable arrangement, the control device would also be a module andthis would then facilitate initial installation or subsequentreplacement of the control device. It also would be advantageous toprovide an arrangement whereby the recognized problems associated withthe loss of motor lubricant and/or the fouling of control device switchcontacts may be substantially reduced, if not eliminated.

SUMMARY OF THE INVENTION Accordingly, it is an object of the presentinvention to provide a new and improved assembly of a control device anddynamoelectric machine.

It is another object of the present invention to provide a new andimproved electric motor adapted for use in driving a speed reducingcontrol device.

Still another object of the present invention is to provide a controldevice module coupled with an electric motor without a requirement forprecision alignment with such motor.

In carrying out the above and other objects of the invention in one formthereof, I provide an assembly of a control device exemplified as atimer of a type particularly adapted for controlling the defrost cycleof a refrigerator, and an electric motor that may be used, e.g., todrive an evaporator cooling fan. In a preferred embodiment, the controldevice and motor are detachably secured to one another and magneticallycoupled so that movement of the rotor assembly of the motor will cause acorresponding, substantially synchronized movement of an input member ofthe control device. In the illustrated control device, a speed reducinggear train is mechanically driven from the input member and a switchactuator, shown as a cam, cyclically causes selective opening andclosing of switch contacts. The control device may, if desired, beessentially totally enclosed to prevent the admission of foreign matterthat might jam the gear train or that might deleteriously affect switchoperation.

While the electric motor may have bearing supports at either end of therotor assembly and may be designed for mechanical duty, a unit bearingmotor of a type commonly used for refrigeration condenser fanapplications has been shown for purposes of exemplification anddiscussion. In the exemplified structure, a polarized magnetic body,secured to and forming part of the rotor assembly, is rotatable within alubricant reservoir of the motor. A lubricant reservoir cover (e.g., anoil well cover) closes the reservoir and, at least in the vicinity ofthe magnetic body, is formed of an essentially nonmagnetic material suchas aluminum or plastic. Thus, the magnetic body establishes a magneticfield that extends beyond the confines of the motor. The influence ofthis magnet, during movement thereof, causes similar movement of apolarized magnetic body that forms at least a part of the control deviceinput member. The control device and motor are modular units and may bemanufactured and transported as individually complete components ifdesired, since the lubricant reservoir cover will prevent the loss oflubricant from the motor during transport as well as during operation.

The invention itself is particularly set forth in the claims in theconcluding portion hereof. However, the above mentioned and otherfeatures and objects of the present invention and manner of attainingthem will become more apparent and will be better understood byreference to the following description of embodiments of the inventiontaken in conjunction with the accompanying drawing.

BRIEF DESCRIPTION OF THE DRAWING In the drawing:

FIG. 1 is an exploded perspective view, with parts in section, partsremoved, and parts broken away, of a dynamoelectric machine and controldevice assembly;

FIG. 2 is an inverted perspective view, with parts in section, partsremoved, and parts broken away of a switching means and support thereforthat has been removed from the structure of FIG. 1 but normally isassembled therewith; and

FIG. 3 is a side elevation, with parts in section, parts removed, andparts broken away, of another embodiment of the invention.

DESCRIPTION OF THE PREFERRED EMBODIMENTS With reference to FIG. 1, byway of example only, an exploded assembly of a dynamoelectric machineand control device has been illustrated as including an electric motor11 of the unit bearing type having a stator assembly 12 and rotorassembly; and a control 14 that is particularly adapted for use as anautomatic defrost control in a refrigerator.

The motor 11 is a modular unit, that is, it may be manufactured,transported, and utilized with a control device other than theillustrated control device 14 or in conventional manner without acontrol device. However, when the motor 11 is to be transported and/orused separately, the end cap or oil well cover 15 (normally provided toprevent loss of lubricant from the lubricant reservoir 16 of the motor)will be assembled with the motor rather than the control device 14 asshown in the drawing.

Disposed within the lubricant reservoir 16 are means, such as a feltring 17 and felt feeder wick 18, for storage and supply of lubricant forthe bearing means of the motor 11. Furthermore, the rotor assembly ofthe motor 11, in addition to including a laminated magnetic rotor corehaving a shortcircuited squirrel cage winding, includes a polarizedmagnetic body 19 secured to one end of the shaft 21 of the rotorassembly.

As clearly revealed in FIG. 1, the shaft 21 includes a magnetic meanslocating shoulder. After the illustrated magnetic means has beenpositioned on the shaft 21, the shaft and magnetic means are permanentlyfastened together in any suitable manner. For example, the end of shaft21 may be peened or swedged against the polarized magnetic body 19.Other suitable means for acomplishing this result, known in the art,include epoxy or other structural adhesive materials, and expanding orthreading type fasteners.

The magnetic coupling means of the motor 11 may have essentially onlytwo poles, N, S, as shown, or four or more poles and also may besubstantially any desired shape. The magnetic means preferably include alow reluctance path defining member such as the illustrated soft ironplate 22. As will be understood, the plate 22 may be laminated to thepolarized magnetic body 19 or assembled therewith. when securing themagnetic means to the shaft 21. By providing the plate'22, a magneticfield of greater strength or intensity will extend from the polarizedbody 19 toward the control device 14 than would otherwise be the case.

When the motor 11 is to be manufactured and transported separately, theoil well cover 15 will be assembled therewith, e.g., by means of thethreaded fasteners 23. Of course other suitable means may also be used,and the cover may be press fitted to the motor shell or secured theretowith epoxy or other adhesive material. When the fasteners 23 are used,they pass through the openings 24 in the cover 15 and are secured to thethreaded openings 26 in the motor shell.

The illustrated motor 11 is of a general type that has been utilizedheretofore in many fluid material moving applications. For example, themotor 11 may be mounted, by means of suitable fasteners retained in thethreaded openings 27, in proximity to the condenser coil ofrefrigeration equipment. In these and similar applications, a fan bladewill be received and fastened to the threaded portion 28 of the shaft31. As previously mentioned, a motor having two or more bearing meansmay be utilized, and the unit bearing motor 1 1 has been shown only forpurposes of exemplification.

When the motor 11 is installed in the desired environment where it willbe used, it may be energized in any known or desired fashion by applyingan energization voltage across the termination means of the motor thathas been illustrated as the terminals 30, 29.

The rotor assembly of motor 11 includes two separate means fortransferring power from the motor. A first of these means is theextension 31 of the shaft which may be mechanically coupled to a powertransmitting member such as a gear, hub, fan blade, pulley, sprocket,and so on. The second of these means is the magnetic coupling means thatestablishes a moving magnetic field which in turn may be used tomagnetically couple the motor 11 with a device to be driven thereby. Inthe illustrated exemplification, the second power transfer means may beutilized without loss of lubricant from the lubricant reservoir 16 sincethe reservoir will be substantially completely sealed by the oil wellcover 15.

In order to maximize the strength of the moving magnetic fieldestablished by movement of the polarized magnetic body 19, it ispreferable to form the cover 15 from a nonmagnetic material, such asaluminum. or plastic or at least to arrange the cover 15 so that aportion of the cover (defined for example by the illustrated opening 32)overlying the magnetic means will be either open or formed of a materialso as to not prevent the establishment of amagnetic field (associatedwith the polarized magnetic body 19) outside the'confines of cover 15.Accordingly, when the cover 15 is formed of steel as illustrated, awindow or opening therein is formed as shown at 32. If desired, theopening may be sealed with a plastic, aluminum, or other nonmagneticmaterial member to prevent loss of lubricant from reservoir 16 and toprevent entry thereinto of foreign matter.

In applications where a rotor assembly shaft extends externally fromboth ends of a motor, a polarized body of magnetic material may besupported for movement externally of the motor. In these forms, an endframe or oil well cover may be made substantially in the same manner ashas been done heretofore. For example, a polarized body of magneticmaterial may be provided on an end of the shaft of a so-called skeletontype of motor as shown, e.g., in the copending application of Ralph E.Church, Ser. No. 99,049, filed Dec. 17, 1970, and the entire disclosureof which is incorporated herein by reference. The polarized body ofmagnetic material so provided would be supported on the shaft of theskeleton motor on the exterior of an oil reservoir cover normallyprovided on such motors.

With continued reference to FIG. 1, the control device 14 includes aspeed reducing mechanism illustrated as a driven gear reduction drivetrain 35. In the device illustrated, a pair of shafts 36, 37 are eachsupported at opposite end walls 38, 39 of the housing of the device. Theinput member for the device is freely rotatable on the shaft 36 andincludes a polarized body of magnetic material 41 that may besubstantially identical to the body 19. The polarized body 41 and acommon iron plate 42 may be secured by adhesive material or othersuitable means to a gear or disc 43 that is fixedly secured to a drivingpinion 44.

It is emphasized that the magnetic means of the control device 14, i.e.,the polarized body 41 may be of any desired configuration and need notbe substantially identical to the polarized body 19 as shown in FIG. 1.During operation of the assembly 10, as the polarized body 19 moves, themagnetic field associated therewith will cause the polarized body 41 toeffect rotation of the drive pinion 44, the entire assemblage ofelements 41 through 44 turning freely on the shaft 36. Pinion 44 in turndrives gear 46 and pinion 47 attached thereto, both of which are freelyrotatable on the shaft 37. Similar gear and pinion members, denoted bynumeral 48, are used to establish a desired overall speed reduction ofthe device 14. In the illustrated exemplification, the gear and pinionmembers as well as disc 43 were formed of nylon material and, when thespeed of motor 11 was about 1,440 r.p.m., the output speed of the shaft37 was about 0.00241 r.p.m. All of the pinions used in the illustrateddevice 14 were provided with 11 teeth and all of the gears were providedwith 58 teeth so that the over-all speed reduction ratio was about597,423 to l.

The final or output gear and pinion set 48, denoted by the referencenumeral 49, are fastened to the shaft 37 by a known manner, e.g., bypress fitting the gear and pinion set 49 to the shaft 37 or by forcingthe set 49 onto a knurled section of the shaft 37. The shaft 37, througha unidirectional slip clutch in the form of a coil spring 51, drives aswitch actuator illustrated as cam 52. During operation, the cam 52 isdriven in the direction of arrow 53 through the slip clutch arrangement.

When it is desired to reset or reposition the cam 52 relative to theshaft 37, a cam reset member 54 secured to or integral with the cam 52may be moved, relative to shaft 37, in the same direction as thatindicated by arrow 53. Thus, the cam 52 may be reset or repositionedrelative to the shaft 37. As will be understood, during such anadjustment, movement of the cam 52 causes the convolutions of the spring51 to open slightly and release the shaft 37. However, when shaft 37 isthe driving member, the convolutions of the spring 51 will tend to betightened on the shaft 37 and insure that the cam 53 is driven by theshaft 37 in the direction of the arrow 53.

For ease of fabrication of the assembly shown in exploded form in FIG.I, a window 32 (described above) was cut in the oil well cover 15 andscrews 56 were used to secure together the oil well cover and end wall39 of the control device housing. When assembled, a switch contactsupport member (shown as an additional substantially cylindrical housing57 in FIG. 2) was also assembled with the structure illustrated in FIG.1.

In the final assembly, the fasteners 23 were inserted initially throughopenings illustrated as slots 58 in the cover 57 and thus securedtogether all of the structure illustrated in FIGS. 1 and 2. Whenassembled, the housing and switch means shown in FIG. 2 are invertedrelative to the position thereof as shown in FIG. 2. After suchinversion, the opening 59 formed in the rear wall 61 of cover 56 issubstantially centered and aligned with the axis of the output shaft 37.The opening 59 then provides access for adjusting or resetting theposition of cam 52 on the shaft 37. This adjustment may be performedwhen desired by inserting a tool through the opening 59 and engaging theadjusting disc 54 for movement thereof as previously described.

During operation of the control device 14, either one or both of thecenter spring 62 and inner spring 63 (these relative positions beingestablished by their positions relative to the center of cam 52) will beengaged by the surface of the cam 52 during at least part of each fullrevolution of the cam 52. As will be understood, the inner and outercontact springs 63, 64, respectively, each support an electrical contactelement or surface 66 whereas the center spring member 62 supports apair of oppositely facing contact surfaces 67.

Under normal operating conditions, when the device 14 is utilized as adefrost cycle control, the inner spring 63 (or at least the outermostextremity thereof) rides on the surface of the cam 52 and the contact 66of the inner spring 63 will be in closed electrical circuit maintainingrelationship with a contact 67 on the center spring 62. Then, as thehigh point 71 of the cam 52 reaches the extremities of the spring arms63, 62, switching will occur, with the inner spring 63 snappingdownwardly toward the relieved region 73 of the cam 52 as the camcontinues rotating. Snapping arm or spring 63, through connector 74,pulls the outer spring arm 64 toward the center spring 62 and contactbetween springs 63 and 62 is broken whereas electrical contact betweensprings 62 and 66 is established.

During the just described portion in the switching cycle, therefrigeration compressor normally will be deenergized and defrostingmeans, such as a heater, will be energized. Spade type terminals 76, 77,and 78 are respectively connected to the spring members 63, 62, and 64.

When the terminals 76, 77, 78 are connected in a refrigeration apparatusenergization circuit for operation of the device 14 as above described,terminal 77 may conveniently be connected in circuit with one side ofthe supply line whereas terminal 76 may be connected to one side of thecompressor motor (utilized to compress and move a fluid, such asrefrigerant, through refrigeration coils), and the terminal 78 may beconnected to one side of a defrosting means, such as a heater.

In the exemplification just described, I have found that only about asmall amount of torque need be transmitted from the polarized body 19 tothe input of the device 14 in order to attain enough output torque forthe desired switching operation of the device 14. More than a sufficientamount of torque for this purpose can be transmitted with thearrangement substantially as illustrated in FIGS. 1 and 2.- For example,with the gap between the facing portions of polarized bodies 19 and 41being held at approximately Mi to of an inch, about 24 ounce-inches oftorque can be attained with the motor 11 operating at a nominal speed ofabout 1,440 rpm. The polarized magnetic bodies 19 and 41 may be formedof any suitable material. In the exemplification, permanent magnetmaterial in the form of ferrite powder within a nitrile rubber matrixwas utilized. This type of material is commercially available fromdifferent sources, one of which is designated by Minnesota Mining &Manufacturing Company as Plastiform permanent magnet material. In theexemplification, the bodies 19 and 41 were about /10 of an inch wide byabout 9/10 of an inch long and about l/l0 of an inch thick. However, forreasons, including ease of fabrication and utilization of economicallyavailable materials, one or both of the polarized magnetic bodies may bein the form of disc magnets. For example, discs of about 0.125 inchesthick and about 0.875 inches in diameter may be used in theexemplification with about the same results. Thus, the spacing betweenthe disc magnets would still be in the order of about A to It; of aninch and the torque transmittable therebetween would be approximately asdescribed above, while utilizing a windowless substantially imperforateoil well cover formed of about 0.026 of an inch thick aluminum material.Regardless of the shape of the polarized bodies, other materials mayalso be used. For example, magnetic material in a phenolic matrix orALNICO magnet material may be used, among others.

A disc type magnet 81, backed by a common iron washer 82 is utilized asthe power output polarized magnetic body in the assembly 80 shown inFIG. 3. The motor 83 in assembly 80 is substantially identical to themotor 11. The oil well cover 84 is formed of about 0.026 of an inchaluminum material and is press fitted and adhesively secured to thehousing of the motor 83. It will be seen from FIG. 3 that the cover 84is formed to have generally cup shaped portion indicated by the numeral86. The polarized magnetic body 81 is located generally within thisportion 86 of the cover.

The driven polarized magnetic body 87 is in the form of a cylindricalmagnetic collar. In the arrangement illustrated by FIG. 3, thecylindrical shaped collar 87 is preferably providedwith the same numberof poles of opposite polarity as the number of poles of oppositepolarity that are provided around the circular or cylindrical peripheryof the disc 81. The control device 88 shown in FIG. 3 may be constructedand utilized for generally the same purposes as the control device 14.However, for ease of fabrication, the housing 89 thereof is illustratedas a generally tubular shaped drawn or formed steel or aluminum tube,with a cup shaped shaft supporting member 91 pressed therein. The device88 is secured to the oil well cover 84 by means of screws 92 as shown.Access for insertion and removal of a plurality of screws 92 ispermitted by holes 93 formed in the cover 91, the location of such holesand screws being selected so that access thereto will not be preventedby the gears on the shaft 37.

In the FIG. 3 exemplification, all of the gear pairs 48 are freelyrotatable on the shaft 37 in a fashion similar to that described abovein connection with the device 14. However, the driven polarized magneticbody 87 is secured through an adapter or disc 94 to the shaft 36 bypeening or other suitable means. The input or first gear 96 and pinion97 attached thereto are locked to the shaft 36, e.g., by being pressfitted thereon, so that power will be transmitted from shaft 36 to thegear and pinion 96, 97 in the assembly 80.

The remainder of the device 88, including gear pairs 48, the balance ofshafts 36 and 37, a cam corresponding to cam 52, and switching meanshave not been shown, it being understood that these elements will beincluded in an assembly but have been omitted from FIG. 3 in order tosimplify description thereof. It also will be understood that theconfiguration of cam 52 or other means driven by the motor 11, includingthe entire control device magnetically coupled therewith, may beprovided in any desired configuration so as to provide any desiredsequence of switch operation and dwell periods between switch actuationto thus provide a desired sequence of control functions or operations.

It will now be seen that I have provided new and improved motor andcontrol device assemblies as well as motor modules and control devicemodules between which power may readily be transferred through amagnetic coupling. Thus difficulties associated with the precisealignment and location of interconnecting gearing members between motorsand control devices may be eliminated.

Accordingly, while I have described what at present are considered to bepreferred embodiments of my invention in accordance with the PatentStatutes, it will be obvious to those skilled in the art that variouschanges and modifications may be made therein without departing from theinvention. It is aimed in the appended claims, therefore, to cover allvariations and modifications as fall within the true spirit and scope ofthe invention.

What I claim as new and desire to secure by Letters Patent of the UnitedStates is:

l. A dynamoelectric machine and control device assembly; saiddynamoelectric machine including a magnetic stator core, bearing meansfor supporting a rotor assembly for rotation relative to the magneticstator core, a lubricant reservoir for supplying lubricant to at leastpart of the bearing means, and a rotor assembly including a firstpolarized body of magnetic material; said control device including aplurality of members having gear teeth and arranged in speed reducingrelationship, and driven output means and driven input means coupled ina speed reducing arrangement by the plurality of members; said driveninput means including at least one second polarized body of magneticmaterial magnetically coupled with the first polarized body of magneticmaterial so that movement of a magnetic field associated with the firstpolarized body of magnetic material causes corresponding movement of theat least one second polarized magnetic body whereby the control deviceis operated in response to operation of the dynamoelectric machine.

2. A dynamoelectric machine and control device assembly; saiddynamoelectric machine including a magnetic stator core, bearing meansfor supporting a rotor assembly for rotation relative to the magneticstator core, a lubricant reservoir for supplying lubricant to at leastpart of the bearing means, and a rotor assembly including a firstpolarized body of magnetic material;

said control device including driven output means and driven input meanscoupled in a speed reducing arrangement, said driven input meansincluding at least one second polarized body of magnetic materialmagnetically coupled with the first polarized body of magnetic materialso that movement of a magnetic field as sociated with the firstpolarized body of magnetic material causes corresponding movement of theat least one second polarized magnetic body whereby the control deviceis operated in response to operation of the dynamoelectric machine; andsaid assembly further comprising a lubricant loss preventing memberdisposed between the magnetically coupled first and second polarizedbodies of magnetic material thereby to prevent loss of lubricant fromthe lubricant reservoir, and transfer of lubricant from the lubricantreservoir to the control device.

3. An electric motor and control device assembly; said electric motorincluding a magnetic stator core, a rotor assembly including a shaft,bearing means for supporting the rotor assembly for rotation relative tothe magnetic stator core, first power transfer means comprising a firstportion of the shaft extending from the motor and second power transfermeans including a first polarized body of magnetic material supportedfor movement relative to the stator core and driven by a second portionof the shaft so as to be movable in response to movement of the rotorassembly; said control device including gear means and driven inputmeans interconnected with the gear means; said driven input meanscomprising at least one second polarized body of magnetic materialmagnetically coupled with the first polarized body of magnetic materialso that movement of a magnetic field associated with the first polarizedbody of magnetic material causes corresponding movement of the at leastone second polarized magnetic body and associated movement of said gearmeans.

4. An electric motor and control device assembly; said electric motorincluding a magnetic stator core, a rotor assembly, bearing means forsupporting the rotor assembly adjacent at least one end thereof forrotation relative to the magnetic stator core, first power transfermeans comprising a portion of a shaft extending from the motor andsecond power transfer means including a first polarized body ofpermanently magnetized material located outboard of the bearing meansand supported for movement relative to the stator core and movable inresponse to movement of the rotor assembly, and a bearing lubricant losspreventing member positioned outboard of the first polarized body saidcontrol device including driven input means comprising'at least onesecond polarized body of permanently magnetized material magneticallycoupled with the first polarized body of magnetized material so thatmovement of a magnetic field associated with the first polarized body ofmagnetized material causes corresponding movement of the at least onesecond polarized body.

5. The assembly of claim 4 wherein a ferromagnetic member is positionedadjacent to the first polarized body.

6. A dynamoelectric machine comprising a stator assembly; a rotorassembly including shaft means; bearing means supporting the rotorassembly for rotation relative to the stator assembly; a lubricantreservoir in communication with at least part of the bearing means; anda lubricant reservoir cover secured to the stator assembly tosubstantially prevent inadvertent loss of lubricant from the lubricantreservoir; said rotor assembly including at least two separate powertransfer means; a first one of the power transfer means comprising afirst portion of the shaft means accessible from the exterior of thestator assembly for connection with a first preselected powertransmitting member; and a second one of the power transfer meanscomprising a polarized body of magnetic material located between thebearing means and the lubricant reservoir cover; at least a portion ofthe lubricant reservoir cover in proximity with the polarized body beingformed of a nonmagnetic material whereby moving lines of magnetic fluxassociated with movement of the polarized body of magnetic material maybe utilized for moving another polarized body of magnetic materialassociated with a control device supported in fixed relationshiprelative to the stator assembly.

7. The dynamoelectric machine of claim 6 wherein a ferromagnetic memberis positioned closely adjacent to the polarized body of magneticmaterial.

8. An electric motor including a stator assembly; bearing meanssupporting a rotor assembly for movement relative to the statorassembly; first movable power transfer means comprising at least a partof the rotor assembly accessible from the exterior of the statorassembly; and second movable power transfer means comprising a polarizedbody of magnetic material movable in predetermined relationship with thefirst movable power transfer means; said first power transfer meansbeing adapted for mechanically coupling'the rotor assembly and firstdriven means and said second power transfer means being movableconcurrently with the first power transfer means whereby second drivenmeans may be magnetically coupled therewith and driven thereby; saidmotor having at least one bearing and further including a protectivecover that overlies the polarized body of magnetic material, saidprotective cover substantially preventing loss of bearing lubricant fromthe motor.

9. An electric motor of the unit bearing type, including a stator;bearing means supporting a rotor assembly for movement relative to thestator; first movable power transfer means comprising at least a part ofthe rotor assembly accessible from the exterior of the stator; andsecond movable power transfer means comprising a polarized body ofmagnetic material movable in predetermined relationship with the firstmovable power transfer means; said first power transfer means beingadapted for mechanically coupling the rotor assembly and first drivenmeans and said second power transfer means being movable concurrentlywith the first power transfer means whereby second driven means may bemagnetically coupled therewith and driven thereby; the electric motorfurther including a protective cover that overlies the polarized body ofmagnetic material, said protective cover substantially preventing lossof bearing means lubricant from the motor.

10. The structure of claim 8 wherein the first power transfer meanscomprises a portion of shaft adapted for connection with a fluidmaterial moving element and the second power transfer means comprises atleast one permanent magnet concealed within the motor whereby the motormay be used as a power module for concurrently moving a fluid materialand driving a device magnetically coupled therewith.

11. A timing control device for use in controlling the initiation of atleast one predetermined operational sequence of an appliance at leastapproximately in response to a cumulative number of revolutions of afluid medium moving electric motor, said device including a housing;power input means including at least one polarized body of magneticmaterial; and power output means including an output shaft drivinglycoupled with said power input means; said polarized body of magneticmaterial being movably supported and positioned within said housing tofacilitate magnetic coupling between said polarized body of magneticmaterial and anment with the at least one polarized body.

1. A dynamoelectric machine and control device assembly; saiddynamoelectric machine including a magnetic stator core, bearing meansfor supporting a rotor assembly for rotation relative to the magneticstator core, a lubricant reservoir for supplying lubricant to at leastpart of the bearing means, and a rotor assembly including a firstpolarized body of magnetic material; said control device including aplurality of members having gear teeth and arranged in speed reducingrelationship, and driven output means and driven input means coupled ina speed reducing arrangement by the plurality of members; said driveninput means including at least one second polarized body of magneticmaterial magnetically coupled with the first polarized body of magneticmaterial so that movement of a magnetic field associated with the firstpolarized body of magnetic material causes corresponding movement of theat least one second polarized magnetic body whereby the control deviceis operated in response to operation of the dynamoelectric machine.
 2. Adynamoelectric machine and control device assembly; said dynamoelectricmachine including a magnetic stator core, bearing means for supporting arotor assembly for rotation relative to the magnetic stator core, alubricant reservoir for supplying lubricant to at least part of thebearing means, and a rotor assembly including a first polarized body ofmagnetic material; said control device including driven output means anddriven input means coupled in a speed reducing arrangement, said driveninput means including at least one second polarized body of magneticmaterial magnetically coupled with the first polarized body of magneticmaterial so that movement of a magnetic field associated with the firstpolarized body of magnetic material causes corresponding movement of theat least one second polarized magnetic body whereby the control deviceis operated in response to operation of the dynamoelectric machine; andsaid assembly further comprising a lubricant loss preventing memberdisposed between the magnetically coupled first and second polarizedbodies of magnetic material thereby to prevent loss of lubricant fromthe lubricant reservoir, and transfer of lubricant from the lubricantreservoir to the control device.
 3. An electric motor and control deviceassembly; said electric motor including a magnetic stator core, a rotorassembly including a shaft, bearing means for supporting the rotorassembly for rotation relative to the magnetic stator core, first powertransfer means comprising a first portion of the shaft extending fromthe motor and second power transfer means including a first polarizedbody of magnetic material supported for movement relative to the statorcore and driven by a second portion of the shaft so as to be movable inresponse to movement of the rotor assembly; said control deviceincluding gear means and driven input means interconnected with the gearmeans; said driven input means comprising at least one second polarizedbody of magnetic material magnetically coupled with the first polarizedbody of magnetic material so that movement of a magnetic fieldassociated with the first polarized body of magnetic material causescorresponding movement of the at least one second polarized magneticbody and associated movement of said gear means.
 4. An electric motorand control device assembly; said electric motor including a magneticstator core, a rotor assembly, bearing means for supporting the rotorassembly adjacent at least one end thereof for rotation relative to themagnetic stator core, first power transfer means comprising a portion ofa shaft extending from the motor and second power transfer meansincluding a first polarized body of permanently magnetized materiallocated outboard of the bearing means and supported for movementrelative to the stator core and movable in response to movement of therotor assembly, and a bearing lubricant loss preventing memberpositioned outboard of the first polarized body ; said control deviceincluding driven input means comprising at least one second polarizedbody of permanently magnetized material magnetically coupled with thefirst polarized body of magnetized material so that movement of amagnetic field associated with the first polarized body of magnetizedmaterial causes corresponding movement of the at least one secondpolarized body.
 5. The assembly of claim 4 wherein a ferromagneticmember is positioned adjacent to the first polarized body.
 6. Adynamoelectric machine comprising a stator assembly; a rotor assemblyincluding shaft means; bearing means supporting the rotor assembly forrotation relative to the stator assembly; a lubricant reservoir incommunication with at least part of the bearing means; and a lubricantreservoir cover secured to the stator assembly to substantially preventinadvertent loss of lubricant from the lubricant reservoir; said rotorassembly including at least two separate power transfer means; a firstone of the power transfer means comprising a first portion of the shaftmeans accessible from the exterior of the stator assembly for connectionwith a first preselected power transmitting member; and a second one ofthe power transfer means comprising a polarized body of magneticmaterial located between the bearing means and the lubricant reservoircover; at least a portion of the lubricant reservoir cover in proximitywith the polarized body being formed of a nonmagnetic material wherebymoving lines of magnetic flux associated with movement of the polarizedbody of magnetic material may be utilized for moving another polarizedbody of magnetic material associated with a control device supported infixed relationship relative to the stator assembly.
 7. Thedynamoelectric machine of claim 6 wherein a ferromagnetic member ispositioned closely adjacent to the polarized body of magnetic material.8. An electric motor including a stator assembly; bearing meanssupporting a rotor assembly for movement relative to the statorassembly; first movable power transfer means comprising at least a partof the rotor assembly accessible from the exterior of the statorassembly; and second movable power transfer means comprising a polarizedbody of magnetic material movable in predetermined relationship with thefirst movable power transfer means; said first power transfer meansbeing adapted for mechanically coupling the rotor assembly and firstdriven means and said second power transfer means being movableconcurrently with the first power transfer means whereby second drivenmeans may be magnetically coupled therewith and driven thereby; saidmotor having at least one bearing and further including a protectivecover that overlies the polarized body of magnetic material, saidprotective cover substantially preventing loss of bearing lubricant fromthe motor.
 9. An electric motor of the unit bearing type, including astator; bearing means supporting a rotor assembly for movement relativeto the stator; first movable power transfer means comprising at least apart of the rotor assembly accessible from the exterior of the stator;and second movable power transfer means comprising a polarized body ofmagnetic material movable in predetermined relationship with the firstmovable power transfer means; said first power transfer means beingadapted for mechanically coupling the rotor assembly and first drivenmeans and said second power transfer means being movable concurrentlywith the first power transfer means whereby second driven means may bemagnetically coupled therewith and driven thereby; the electric motorfurther including a protective cover that overlies the polarized body ofmagnetic material, said protective cover substantially preventing lossof bearing means lubricant from the motor.
 10. The structure of claim 8wherein the first power transfer means comprises a portion of shaftadapted for connection with a fluid material moving element and thesecond power transfer meanS comprises at least one permanent magnetconcealed within the motor whereby the motor may be used as a powermodule for concurrently moving a fluid material and driving a devicemagnetically coupled therewith.
 11. A timing control device for use incontrolling the initiation of at least one predetermined operationalsequence of an appliance at least approximately in response to acumulative number of revolutions of a fluid medium moving electricmotor, said device including a housing; power input means including atleast one polarized body of magnetic material; and power output meansincluding an output shaft drivingly coupled with said power input means;said polarized body of magnetic material being movably supported andpositioned within said housing to facilitate magnetic coupling betweensaid polarized body of magnetic material and another polarized body ofmagnetic material driven by the fluid medium moving electric motor tothereby permit the use of a fluid medium moving motor for driving saiddevice when the housing is supported in fixed operative relationshiprelative to the fluid medium moving electric motor.
 12. The structure ofclaim 11 wherein the timing control device further includes aferromagnetic member positioned closely adjacent to and fastened formovement with the at least one polarized body.